As long as she has reached at
least normal retirement age, her survivor benefit will not be reduced, but her own retirement benefit will disappear.
That is, the so - called increase in the Social Security monthly benefit if you delay taking benefits beyond your
normal retirement age is at
least in part due to the fact that a «fixed pot of money» is being divided into larger chunks at
age 70 (fewer months to live) than at
age 67 (more months to live).